From patchwork Thu May 17 11:06:23 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Laurent Dufour X-Patchwork-Id: 915360 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 40mq756jdFz9s0q for ; Thu, 17 May 2018 21:38:09 +1000 (AEST) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.vnet.ibm.com Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 40mq754ts0zF14x for ; Thu, 17 May 2018 21:38:09 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.vnet.ibm.com X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=none (mailfrom) smtp.mailfrom=linux.vnet.ibm.com (client-ip=148.163.158.5; helo=mx0a-001b2d01.pphosted.com; envelope-from=ldufour@linux.vnet.ibm.com; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.vnet.ibm.com Received: from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 40mpRj1RDvzF1mt for ; Thu, 17 May 2018 21:07:28 +1000 (AEST) Received: from pps.filterd (m0098413.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w4HB4TRx034484 for ; Thu, 17 May 2018 07:07:26 -0400 Received: from e06smtp13.uk.ibm.com (e06smtp13.uk.ibm.com [195.75.94.109]) by mx0b-001b2d01.pphosted.com with ESMTP id 2j183q9f13-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Thu, 17 May 2018 07:07:26 -0400 Received: from localhost by e06smtp13.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Thu, 17 May 2018 12:07:22 +0100 Received: from b06cxnps4076.portsmouth.uk.ibm.com (9.149.109.198) by e06smtp13.uk.ibm.com (192.168.101.143) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Thu, 17 May 2018 12:07:13 +0100 Received: from d06av22.portsmouth.uk.ibm.com (d06av22.portsmouth.uk.ibm.com [9.149.105.58]) by b06cxnps4076.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w4HB7CpP7340322 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Thu, 17 May 2018 11:07:12 GMT Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 334254C059; Thu, 17 May 2018 11:59:01 +0100 (BST) Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id E7D1F4C04A; Thu, 17 May 2018 11:58:59 +0100 (BST) Received: from nimbus.lab.toulouse-stg.fr.ibm.com (unknown [9.101.4.33]) by d06av22.portsmouth.uk.ibm.com (Postfix) with ESMTP; Thu, 17 May 2018 11:58:59 +0100 (BST) From: Laurent Dufour To: akpm@linux-foundation.org, mhocko@kernel.org, peterz@infradead.org, kirill@shutemov.name, ak@linux.intel.com, dave@stgolabs.net, jack@suse.cz, Matthew Wilcox , khandual@linux.vnet.ibm.com, aneesh.kumar@linux.vnet.ibm.com, benh@kernel.crashing.org, mpe@ellerman.id.au, paulus@samba.org, Thomas Gleixner , Ingo Molnar , hpa@zytor.com, Will Deacon , Sergey Senozhatsky , sergey.senozhatsky.work@gmail.com, Andrea Arcangeli , Alexei Starovoitov , kemi.wang@intel.com, Daniel Jordan , David Rientjes , Jerome Glisse , Ganesh Mahendran , Minchan Kim , Punit Agrawal , vinayak menon , Yang Shi Subject: [PATCH v11 16/26] mm: introduce __vm_normal_page() Date: Thu, 17 May 2018 13:06:23 +0200 X-Mailer: git-send-email 2.7.4 In-Reply-To: <1526555193-7242-1-git-send-email-ldufour@linux.vnet.ibm.com> References: <1526555193-7242-1-git-send-email-ldufour@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 18051711-0012-0000-0000-000005D790EB X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18051711-0013-0000-0000-00001954BBD2 Message-Id: <1526555193-7242-17-git-send-email-ldufour@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2018-05-17_05:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 impostorscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1709140000 definitions=main-1805170100 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.26 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linuxppc-dev@lists.ozlabs.org, x86@kernel.org, linux-kernel@vger.kernel.org, npiggin@gmail.com, linux-mm@kvack.org, paulmck@linux.vnet.ibm.com, Tim Chen , haren@linux.vnet.ibm.com Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" When dealing with the speculative fault path we should use the VMA's field cached value stored in the vm_fault structure. Currently vm_normal_page() is using the pointer to the VMA to fetch the vm_flags value. This patch provides a new __vm_normal_page() which is receiving the vm_flags flags value as parameter. Note: The speculative path is turned on for architecture providing support for special PTE flag. So only the first block of vm_normal_page is used during the speculative path. Signed-off-by: Laurent Dufour --- include/linux/mm.h | 18 +++++++++++++++--- mm/memory.c | 21 ++++++++++++--------- 2 files changed, 27 insertions(+), 12 deletions(-) diff --git a/include/linux/mm.h b/include/linux/mm.h index f385d721867d..bcebec117d4d 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -1317,9 +1317,21 @@ static inline void INIT_VMA(struct vm_area_struct *vma) #endif } -struct page *_vm_normal_page(struct vm_area_struct *vma, unsigned long addr, - pte_t pte, bool with_public_device); -#define vm_normal_page(vma, addr, pte) _vm_normal_page(vma, addr, pte, false) +struct page *__vm_normal_page(struct vm_area_struct *vma, unsigned long addr, + pte_t pte, bool with_public_device, + unsigned long vma_flags); +static inline struct page *_vm_normal_page(struct vm_area_struct *vma, + unsigned long addr, pte_t pte, + bool with_public_device) +{ + return __vm_normal_page(vma, addr, pte, with_public_device, + vma->vm_flags); +} +static inline struct page *vm_normal_page(struct vm_area_struct *vma, + unsigned long addr, pte_t pte) +{ + return _vm_normal_page(vma, addr, pte, false); +} struct page *vm_normal_page_pmd(struct vm_area_struct *vma, unsigned long addr, pmd_t pmd); diff --git a/mm/memory.c b/mm/memory.c index deac7f12d777..cc4e6221ee7b 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -780,7 +780,8 @@ static void print_bad_pte(struct vm_area_struct *vma, unsigned long addr, } /* - * vm_normal_page -- This function gets the "struct page" associated with a pte. + * __vm_normal_page -- This function gets the "struct page" associated with + * a pte. * * "Special" mappings do not wish to be associated with a "struct page" (either * it doesn't exist, or it exists but they don't want to touch it). In this @@ -821,8 +822,9 @@ static void print_bad_pte(struct vm_area_struct *vma, unsigned long addr, * PFNMAP mappings in order to support COWable mappings. * */ -struct page *_vm_normal_page(struct vm_area_struct *vma, unsigned long addr, - pte_t pte, bool with_public_device) +struct page *__vm_normal_page(struct vm_area_struct *vma, unsigned long addr, + pte_t pte, bool with_public_device, + unsigned long vma_flags) { unsigned long pfn = pte_pfn(pte); @@ -831,7 +833,7 @@ struct page *_vm_normal_page(struct vm_area_struct *vma, unsigned long addr, goto check_pfn; if (vma->vm_ops && vma->vm_ops->find_special_page) return vma->vm_ops->find_special_page(vma, addr); - if (vma->vm_flags & (VM_PFNMAP | VM_MIXEDMAP)) + if (vma_flags & (VM_PFNMAP | VM_MIXEDMAP)) return NULL; if (is_zero_pfn(pfn)) return NULL; @@ -863,8 +865,8 @@ struct page *_vm_normal_page(struct vm_area_struct *vma, unsigned long addr, /* !CONFIG_ARCH_HAS_PTE_SPECIAL case follows: */ - if (unlikely(vma->vm_flags & (VM_PFNMAP|VM_MIXEDMAP))) { - if (vma->vm_flags & VM_MIXEDMAP) { + if (unlikely(vma_flags & (VM_PFNMAP|VM_MIXEDMAP))) { + if (vma_flags & VM_MIXEDMAP) { if (!pfn_valid(pfn)) return NULL; goto out; @@ -873,7 +875,7 @@ struct page *_vm_normal_page(struct vm_area_struct *vma, unsigned long addr, off = (addr - vma->vm_start) >> PAGE_SHIFT; if (pfn == vma->vm_pgoff + off) return NULL; - if (!is_cow_mapping(vma->vm_flags)) + if (!is_cow_mapping(vma_flags)) return NULL; } } @@ -2753,7 +2755,8 @@ static int do_wp_page(struct vm_fault *vmf) { struct vm_area_struct *vma = vmf->vma; - vmf->page = vm_normal_page(vma, vmf->address, vmf->orig_pte); + vmf->page = __vm_normal_page(vma, vmf->address, vmf->orig_pte, false, + vmf->vma_flags); if (!vmf->page) { /* * VM_MIXEDMAP !pfn_valid() case, or VM_SOFTDIRTY clear on a @@ -3863,7 +3866,7 @@ static int do_numa_page(struct vm_fault *vmf) ptep_modify_prot_commit(vma->vm_mm, vmf->address, vmf->pte, pte); update_mmu_cache(vma, vmf->address, vmf->pte); - page = vm_normal_page(vma, vmf->address, pte); + page = __vm_normal_page(vma, vmf->address, pte, false, vmf->vma_flags); if (!page) { pte_unmap_unlock(vmf->pte, vmf->ptl); return 0;